The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...

Over time, Earth's interior—which is made mostly of silicate rocks and metals—differentiated into four layers. At the planet's heart lies the inner core, a solid sphere of iron and nickel that ...

The work has been published in Progress in Earth and Planetary Science. Using a new data-assimilation ... Being able to study the interactions of these layers vertically and around the globe ...

Despite seeming like a relatively stable place, the Earth's surface has changed dramatically ... there are many horizontal layers, which are called strata. The study of strata is called ...

A group of scientists has discovered a hidden layer of molten rock under the Earth’s surface ... has been writing for over a decade, covering science, gaming, and tech culture.